Concrete pile



E. C. KNUTH.

CONCRETE PILE. APPLlcATloN FILED JUNE 28.1919.

1,393,545. Patend 001. 11, 1921.

FIG. 1. Fra Ffa. 2f

4* 1 Uhr- ATTORNEYS.

- unirse-STATES rArENT OFFICE.

EDWIN c. KNUTH, or ivritwiii'man'7` WISCONSIN.

CONCRETE PILE.

Application filed June 28,

T 0 aZZ w 7mm t may] concern:

e it known that I, EDWIN C. KNUTH, a citizen of the United States and resident of the city of Milwaukee, in the county of lililwaulree andState of Visconsin, lhave invented certain new and useful Improvements in Concretey yPiles; and I do hereby declare that the followingdescription of my invention, taken in" connection withthe accompanying sheet of-drawiiigs, for-insa full, clear, and exact specification, which will enable others skilled in the art to which the said invention appe'rtains to make and use the same. A

rIhis invention hasgeneral referenceV to concrete piles; and it consists, essentially, in the novel and peculiar combination of parts, `and details ofconstruction, as hereinafter firstfully set forth and described, and then pointed out in the claims.

Y Iheobject of this invention is the production of an efficient, serviceable, strong, andcomparatively inexpensive pile for all pu-rposes where pilingmust-be employed to carry a building structure. Another object of this invention is the production of a pile Which' can be employed for local, as well as sheet piling, without change or modification.

In order to accomplish these desirable objects, and others which will hereinafter aippear, I construct this pile as shown in the drawings, forming a part of this specification, in which Figure 1 is an elevation of a concrete pile constructed in accord with my invention. F ig. 2 is a longitudinal sectional elevation of the same. Fig. 3 is a transverse sectional plan on line 3-3 of Fig. 2. Figs. i and 5 are transverse sectional plan views of slightly modified constructions. Fig. 6 is plan view of series of piles showing their adaptability for use in sheet piling. Fig. 7 is a plan view of another modification of my invention.

Like parts are indicated by the same characters and symbols of reference in all the various figures.

This pile comprises a main, rectangular, portion 12, from which project, preferably medially, two branches 13, 14, preferably at right angles to said main body, and formed integrally therewith, so that the whole forms a monolithic structure. These members 12, 13, 14, are of even width and thickness Specification of Letters Patent. patgnted 00h 117 132/1 1919. serial N. 307,384.

throughout, so that all sides thereof-are parallelto one another.

A pile of this construction possesses aidvantages over asolid round, square, or polygonal contourin that for a given diameter, the pileshown in Fig. 8weighs only about of that of a solid pile of the contours mentioned, and offers a greater frictio'nal resistance thana round,` square, or polygonalpile, of the saine weight. These piles are, preferably, manufactured incertain, predetermined sizes and length, and owing to their decreased weight, offer advantages in shipping on account of theirreduced freight charges.

The pile asdescribed has its lower end tapererhas illustrated at 15, which facilitates forcing it into the ground,'and where jetting is desired or necessary, to assist inlsinlring the pile, I locate in the main portion of the pile a tube 16, extending-the entire length of the pile, through which tube a stream of water may be forced to issue therefrom at the lower end'of the pile.

In order to impart' to .this pile .the required strength, I reinforce the same with series of vertically disposed, metallic rods 18, preferably on all of the eight, (more or less) corners, and also at the inner angles of the members, as at 19, and then crossreinforce the pile at the desired or required distance apart, with horizontal reinforcing rods 20, properly tied to the vertical rods at their intersecting points.

In order to adapt theconstruction herein disclosed for use in sheet piling, I form in the outer longitudinal margins of the element 12, longitudinal, preferable V-shaped, grooves 21, and in driving these piles, I place them in a position wherethese grooves are opposing each other, as shown at 21, Fig. 6, and then fil-l the spaces thereby formed with concrete a site; or I force wooden timbers into these spaces to render the joints between the elements 12, water proof.

While this method of employing the piles for sheet piling is very effective, I may form only one longitudinal margin ofthe main element with the groove 21, and bevel the sides of the opposite portion of the main element, as shown in Figs. 4 and 6, at 23, so that the latter member fits into the groove. Any interstices which may result if the piles are not closely driven, or as it may happen,

not perfectly linear, may be readily filled with cement. Sheet piling formed with the elements 12, 13, and 14 is of superior strength, because the two elements projecting from the main body 12, form, as it Were, buttresses for these main portions 12, and

assist in resisting force or Vpressure applied ,to the pile.

While I prefer that the main portion 12 be reinforced by the branches 0r wings 13, 14, formed thereon, I may, in some cases, dispense with one of these wings, as illustrated in Fig. 5, especially so when a smooth surface at one side of the piling is desired; while, if a pile of superior strength is required, I may form two of these branches on each side ofthe main body 12, as shown at 13a, 14a, 17, and 17a, in Fig.V 7, in which case, when the piles are t0 be used for sheet piling, I may provide the longitudinal edges of the members 13a, 14a,y 17, and 1"1 with a r'groove 21 on onememberand a corresponding projection 23 on the other member; and when the piles yhave been driven, fill the spaces 24 thus formed with concrete, or earth, a situ, and ifl preferred, may form these grooves and corresponding projections on adjacent members 13a and 17, and 148L and 17". Y Y

Having thusfully `described this inven-l tion, I claim as new, and'desire to secure to myself by Letters Patent ofthe United States- 1. A reinforced'concrete pile of the kindy a Greek cross, the skeleton structure embedded inconcrete following the outer contour the Greek cross section of the reinforcing structure.

2. A reinforced concrete pile ofV a Greek Ycross section boX like skeleton metallic reinforcing structures extending longitudinally within the two main divisions of the 'pile and metallic tie members forming the sides of said rectangular structures Vand eX- tending across the middle portion of the pile, and a tube extending longitudinally of the pile and within thesquare formed by said ties.

3. A reinforced pile having a Greek crossand forming two parallelograms' crossing at thel center of therpile.

4. A reinforcing pile havingv a cross-section similar to the Greek cross, and a pair o reinforcing skeleton structures penetrating each other at Vthe centerof the pile and extending out into the wings of the pile, as and Vfor the purpose specified.

In testimony thatI claim the foregoing as my invention, I have hereunto set my hand. v

EDWIN 'KNUTIL 

